Warp stop-motion for looms.



No. 649,242. Patented May 8, 1900.

H. I. HABRIMAN.

WARP STOP MOT|0N FUR LOOMS.

(Application filed July 21, 1899.) I (No Model.) 2 Sheets-Sheet lf/a'znesses: Inventor:

No. 649,242. Patented May 8, I900.

.H. l. HAHRIMAN.

WARP STOP MOTION FOR LOOMS. Ab umilm filed July 21, 1599.

2 Shgefs-$haet 2. Y

i I 5 i4} witnesses: I In Wei Mon M 1z6 y M Jgiaq his oQ-orneys.

HENRY I. HARRIMA'N,

PATENT, rnrcnt OF NE? YORK, N. Y;

WARP STOP-MOTION FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 649,242, dated May 8, 1900. Application filed July 21, 1899. Serial No. 724,595. on; model.)

To all whom it may concern.-

Be it known that I, HENRY I. HARRIMAN, a citizen of the United States, residing at New York, in the county of New York, State of New York, have invented a certain new and useful Improvement in \Varp Stop-Motions for Looms, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention comprises improvements in the mechanisms which are employed in looms for the purpose ofstopping the latter automatically in case one or more of the warpthreads should break or become excessively slack.

Various kinds of stop-motion mechanisms have been devised heretofore, some'of them being entirely mechanical in construction and action, while others thereof have been electromechanical. In many of these stop-motion mechanisms a series of drops ordetectors .is applied to the series of warp-threads in a loom and a vibrator or feeler is arranged to move in apath immediatelyadjacent to the position in which the drops or detectors are held by the tension of the warp-threads. The drops or detectors are so arranged or contrived as that in case of breakage or excessive slackness of a warp-thread the corresponding drop or detector assumes a position extending across the path of the vibrator or feeler. In this new position the said drop or detector is encountered by the vibrator or feeler in its movement. As a result of this encounter the unshipping of the driving power and stopping of the loom are occasioned through the action of instrumentalities which thereupon are automatically brought into play. One form of drop or detector which hasgone into general use in warp stop-motions consists of a strip of thin and light sheet metal several inches in length and formedwith a slot or eye for the passage of the warpthread upon which the said drop or detector is strung. The thinness of these drops or deguide and vibrator or feeler.

allel with a suitable backing-bar or guide, their lower ends being maintained by the warp-threads at a sufficient height to clear the path of movement of the vibrator or feeler. \Vhen one descends into the said path, it is struck by the vibrator or feeler and by the advancing movement of the latter pressed toward the said backing-bar or guide. The drops or detectors should'hang with their fiat sides at right angles to the vibrator or feeler and backing-bar or guide, so that when in their lowered position they will be compressed edgewise between the latter two. However, they frequently occupy a more or less oblique position with respect to the backingbar or Should one thereof occupy this oblique position when lowered into the path of the vibrator or feeler, it ordinarily will become completely turned around. as a result of compression between the vibrator or feeler and backing-bar 0r guard until it stands flatwise with relation to the parts between which it is compressed, and then it will bend under pressure exerted by the vibrator or feeler upon the end thereof extending below the backing-bar or guide. For the purpose of obviating this and other disadvantages it has been deemed necessary heretofore to provide means for preventing the drops or detectors from assuming a fiatwise position with relation to the vibrator or feeler when subjected to the pressure thereof. One object of the present invention is to render unnecessary the use of special provisions for preventing the drops or detectors used in a warp stop-motion from turning around and to provide devices which will act equally well whether the drops or detectors stand ed gewise or flatwise with relation to the vibrator or feeler, while also obviating any bending of the drops or detectors which stand flatwise or other injury thereto.

Another object of the mechanism is to provide an improved stop-motion mechanism of simple and efficient character.

The preferred embodiment of the invention is illustrated in the accompanying drawings.

In the said drawings, Figure l is a partlysectional side elevation of a loom containing 'the said embodiment, only such parts of the loom being shown as are necessary to be referred to in explaining the nature and relations of the invention. Fig. 2 is a rear elevation of certain parts pertaining more particularly to the warp stop-motion. Fig. 3 is a plan ofa portion of the breast-beam of the loom and certain parts which are applied thereto. Fig. 4 is'a view in section on line 4 4 in Fig.

-3 looking in the direction indicated by the arrows near the ends of such line. Fig. 5 is a detail view of certainof the parts in Figs. 3 and 4, showing them in front elevation.

Having reference to the drawings, a a designate the sides of the loom-frame.

b is the usual warp-supportin g or guide roll, located at the rear of the loom and known as the whip-roll, it being supported by stands I), which are applied to the side frames at a.

p The detector devices of my improved warpstop-motion mechanism are shown located a short distance in front of the whip-roll b, although the position thereof may be varied in practice.

0, Fig. 1, designates warp-threads passing partly around the whip-roll Z) and extending forwardly therefrom in the 100m.

(1 d are drops or detectors of sheetmetal, such ashave been referred to hereinbefore. Each of the said drops or detectors has a warp-eye 01, through which is passed one of the warp-threads 0. Each is formed also with an elongated slot d to provide for the application of the drop or detector to the supporting and guiding bar which is employed in the loom in connection with each series of upon which the two series of drops or detec- .tors dd are strung, these bars passing through the slots (1 d f f are stands having notched seats which receive the barse e, and f f designate brackets bymeans of which the said stands are supported from the side frames a ct.

:q is a warp-rest which may be employed, if desired, to serve as a support for the warpthreads on the side of the drops or detectors toward the usual position of the harnessfra'ines. (Not shown.) The said warp-rest is iirthe form of a rod or roll having its ends received in seats or hearings provided at g on the stands f f. g I As thus far described the parts are or may be asheretofore.

Adjacent the lower ends of the drops or detectors and in an intermediate position with reference to the two series thereof are located the upper backing-bar h and the lower backing-bar h. The ends of these two backinghars are applied to the stands ff, as shown, the lower backing-bar being located immediately below the under side of the upper backing-bar, their proximate surfaces being separated by a very narrow space.

In connection with each series of drops or detectors I employ a vibrator or feeler i, the two Vibrators or feelers which are employed in the arrangement shown working at opposit-e sides of the pair of backing-bars h h. The vibrators or feelers consist each of a comparatively-thin strip capable of passing edgewise into the narrow space between the said backing-bars h h. For the actuation of the said vibrators or feelers they are mounted herein upon arms 71' i, which are made fast to parallel rock-shafts 1' t the latter being supported by bearings i 1' provided on the brackets f f. The vibrators or feelers are coupled together to move simultaneously in opposite directions, as by means of intermeshing gears 2' i, that are made fast upon the rock-shafts For the transmission of motion to the vibrators or feelers an arm i is made fast upon one of the rock-shafts 2' the said arm being arranged to bear against the peripheryof a cam j on one of the rotating shafts of the loom,

herein the cam-shaft 7c. The cam acts upon the arm to move the vibrators or feelers away from the backing-bars, while they are returned with a yielding force to feel for dropped warp-detectors through the action of a suitable spring, as m. Herein the arm is connected by a link 11 with a lever 2' fulcrumed at i upon a stand L", projecting rearwardly from the front cross-girth 'n. The spring on is connected with the said lever t and its power is transmitted through the latter and the link i to the arm The vibrators or feelers'iiact in the usual manner in connection with lowered drops or detectors which occupy their normal position-namely, edgewise with respect to the backing-bars and vibrators or feelers-that is to say, they compress the said drops 01' detectors ed gewise against the backing-bars until the yielding advancing movement of the vibrators or feelers is arrested by the presence of the lowered drops or detectors in front of the backing-bars. When the lowered drops or detectors occupy a more or less oblique position, the pressure of a Vibrator or feeler thereagainst completes the turning 'of the same until it bears flatwise against the backiiig-bars. The upper and lower backingbars h h are separated from each other only by a space wide enough to just providefor the free working of the vibrators or feelers in and out of the same, and the vibrators or feelers themselves are made quite thin. Consequently the said backing-bar's back up the dropped warp-detectors against the pressure of the advancing vibrators or feelers in immediate proximity to the latter on opposite sides of its path, thereby preventing the said warp-detectors from bending as a result of being pressed flatwise against the backing-bars by the vibrators or feelers. I

For the purpose of causing the driving power of the loom to be unshipped when the vibrators or feelers are prevented from completing their full extent of movement under the action of the spring on mechanical devices are employed as follows:

2' designates a rod which at its lower end is joined to the lever i and atits upper end connects with a movable dog 0. (See Figs. 1, 3, 4, and 5.) In the present instance the said upper end of rod 1' passes through a hole in the rear part of the dog 0, the latter resting on a nut i or other shoulder on the said rod. The dogois pivoted at its front end between lugs depending from the under side of the usualknocking-offleverp. Thelatterserves, as usual, to effect the disengagement of shipper-handle g from the retaining-notch q of the slot g in which the upper portion of the shipper-handle works. The usual weft-fork is shown at r and its slide at a", the latter having a projection at T which is arranged to press the knocking-off lever forward when the weft-fork slide 1" is advanced and thereby to occasion the dislodging of the shipperhandle from the said retaining-notch q. As will be perceived, in the arrangement shown the knocking-off lever 19 is capable of being advanced independently of the weft fork slide, although it is not essential that this movement should be independent, since the two parts may be connected in such manner as to cause them always to move in unison. The advance of the weft-fork slide to cause it to act to move the knocking-off lever and dislodge the shipper-handle is effected in usual manner through the engagement of the head of the gooseneck s with the tail of the weft-fork 1 when the weft is absent from in front of the tines of the said fork. In order to cause the knocking-off lever to be advanced also in the event of breakage or excessive slackness of a warp-thread, the gooseneck s is furnished with a second head or engaging portion 8' for coaction with dog 0. The said dog is provided with a piece 0', Whichis mounted thereon, and is slotted, as at 0 for the passage therethrough of the bolt 0 which secures the said piece to the dog 0, the said slot permitting the piece 0 to be adjusted into the required position to enable it to be engaged by the head or engaging portion 3 at the required point in the advance of the gooseneck. Every time that the vibrators or feelers complete their full movement in feeling for the drops or detectors d the described connections operate to raise dog 0 out of the path of the head or engaging portion 3 of the gooseneck. Whenever the vibrators or feelers are prevented by a fallen drop or detector from completing a stroke, the dog 0 remains down in the said path and is engaged by the said head or engaging portion 3', with the result that knocking-off leverp is operated to dislodge the shipper-handle q.

The periphery of the warp-rest 9 serves as a stop against which the warp-detectors of the front series are drawn by the advancing movement of the warp-threads, and it serves to limit the movement of the warp-detectors of the said series in a direction toward the harnesses The bar h serves'to limit the forward movement of the warp-detectors of the rear series.

The position in which the warp-detectors and associated parts are represented in Fig. 1 of the drawings is convenient, inasmuch as such position permits the usual lease-rods (not necessary to be shown) to belocated either on the side thereof next the whiproll, which is desirable in connection with some kinds of warp-threads, or on the side thereof next the harnesses.

The location of the supporting-bars e 6 above the warp-threads, as in the drawings, is preferable for several reasons. One of these is the fact that in such position there is less tendency for the slots d d of the warpdetectors to become filled with lint. Another is the fact that the increased length of the warp-detectors allows the latter to partially twist with greater facility, so as to lie flatwise at their lower ends against the backingbars 72, h. Hence when in the movement of the vibrators or feelers i '5 toward the backing-bars they encounter one or more dropped warp-detectors occupying a more or less oblique position the twisting of the lower end or ends of such warp-detector or warp-detectors as the same is or are compressed against the backing-bars will be permitted to take place without liability of injury to the said warp-detector or warp-detectors. The fact that the slots (1 d in the warp-detectors are somewhat greater in width than the thickness of the supporting-bars e e enables the warp-detectors to turn on the said barsto a considerable extent before being twisted by the pressure. of the vibrators or feelers.

I claim as my invention 1. In a warp stop-motion for looms, .in combination, a series of thin sheet-metal warp-detectors, guiding means for the same, the vibrator or feeler, and the pair of fixed backingbars separated by a narrow space and backing up a dropped warp-detector against the pressure of the advancing vibrator-or feeler in immediate proximity to the latter at oppo-' site sides of its path, thereby preventing the said warp detector from bending when pressed flatwise between the vibrator or feeler and the backing-bars.

2. In a warp stop-motion for looms, in combination, a series of warp-detectors, a vibrator or feeler moved with a yielding force to feel for the warp-detectors means to occasion the movement of the vibrator or feeler, a knocking-off device, a movable dog in connection therewith, the gooseneck adapted for engagement with the said dog, and connections intermediate the dog and the vibrator or feeler whereby the dog is caused to move into and out of range with the gooseneck in unison with the working of the vibrator or feeler, and

also whereby the engagement of the goose IIO advance of the said slide, the movable dog in connection with the said lever, the gooseneck coacting with both the weft-fork and the dog, a series of warp-detectors, a vibrator or feeler, means to operate the vibrator or feeler, and connections intermediate the dog and the vibrator o r feeler whereby the dog is moved into and out of range with the gooseneck in unison with the working of the vibrator or feeler and the engagement of the same by the gooseneck is controlled.

4. In a loom, in combination, the weft-fork, its slide, the knock off lever operated by the advance of the said slide, the movable dog in connection with the said lever, the gooseneck coacting with both the weft-fork and the dog, a series of warp-detectors, a vibrator or feeler, an arm connected with the vibrator or feeler, a cam acting upon the said arm to move the vibrator or feeler away from the warp-detectors, a spring acting to move the vibrator or feeler toward the warp-detectors, and the lever connected with the said arm, and in operative connection with the said dog.

5. In a warp stop-motion for looms, in combination, a series of thin sheet-metal warp-detectors independent of the harness, guiding means for the same, the vibrator or feeler, and the pair of fixed backing-bars separated by a narrow space and backing up a dropped warp-detector against the pressure of the advancin g vibrator or feeler in immediate proximity to the latter at opposite sides of its path, thereby preventing the said warp-detector from bending when pressed flatwise between the vibrator or feeler and the backing-bars.

In testimony whereof I affix my signature in presence of two witnesses.

HENRY I. HARRIMAN.

Witnesses:

CHAS. F. RANDALL, LEPINE HALL Bron. 

